function DatabaseSelectTestCase::testUnionOrderLimit

Tests that we can UNION multiple Select queries together with a LIMIT.

File

modules/simpletest/tests/database_test.test, line 1753

Class

DatabaseSelectTestCase

Test the SELECT builder.

Code

function testUnionOrderLimit() {
    // This gives George and Ringo.
    $query_1 = db_select('test', 't')->fields('t', array(
        'name',
    ))
        ->condition('age', array(
        27,
        28,
    ), 'IN');
    // This gives Paul.
    $query_2 = db_select('test', 't')->fields('t', array(
        'name',
    ))
        ->condition('age', 26);
    $query_1->union($query_2);
    $query_1->orderBy('name', 'DESC');
    $query_1->range(0, 2);
    $names = $query_1->execute()
        ->fetchCol();
    // Ensure we get only 2 of the 3 records.
    $this->assertEqual(count($names), 2, 'UNION with a limit returned rows from both queries.');
    // Ensure that the names are in the correct reverse alphabetical order,
    // regardless of which query they came from.
    $this->assertEqual($names[0], 'Ringo', 'First query returned correct name.');
    $this->assertEqual($names[1], 'Paul', 'Second query returned correct name.');
}